/**
 * Abstract class for SessionAdapter
 */
export class SessionAdapter {
    /**
     * @param {string} sessionId
     */
    constructor(sessionId: string);
    _id: string;
    _data: {};
    /**
     * @returns {string}
     */
    id(): string;
    /**
     * Abstract method
     *
     * Reads the session to this.data
     *
     * @returns {Promise<void>}
     */
    read(): Promise<void>;
    /**
     * Abstract method
     *
     * Writes session data stored in this.data to the session storage
     *
     * @returns {Promise<void>}
     */
    write(): Promise<void>;
    /**
     * @param {string} key - The key may use the dot notation for accessing to
     *   hierarchical properties
     * @returns {any} Returns undefined if the key is not present in the session
     */
    get(key: string): any;
    /**
     * @param {string} key
     * @param {any} value
     * @returns {SessionAdapter}
     */
    set(key: string, value: any): SessionAdapter;
    /**
     * @param {string} key
     * @returns {SessionAdapter}
     */
    del(key: string): SessionAdapter;
    /**
     * @returns {SessionAdapter}
     */
    clear(): SessionAdapter;
}